I'm not really surprised - IIRC Rise's seiyuu is Kugimin, who's played Idols before (particularly Iorin from iDOLM@STER, and she's even performed life in-character. Mind, she can't dance to save her life, particularly in the Smoky Thrill set, but then that's why you have Azusa (Chiaking), who can dance good enough to compensate for everyone else
).